Showcase shelving



FIG. 1 is a perspective view of a showcase shelving showing my new design;

FIG. 2 is a top elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a right side elevational view thereof.

The broken lines showing is included for the purpose of illustrating environment of the design and forms no part of the claimed design. 

CLAIM The ornamental design for a showcase shelving, as shown and described. 